<!DOCTYPE html>
<html lang="en">
<head>
    <script src="92.jquery类库.js"></script>
    <meta charset="UTF-8">
    <title>Title</title>
<style>
    #d1 {
        font-size: large;

    }
    #d3{
        color: green;
        font-size: large;
    }
</style>
</head>
<body>
    <form action="">
        <p>
            <input type="text" id="d1">
        </p>
        <p>
            <button id = 'd2'>点我飞升</button>
            <span id="d3">11111</span>
        </p>
    </form>
    <script>
        $('#d2').on('click',function(){
            alert('开始飞升!')
            $('#d3').text('开始飞升!')
            return false
        })
    </script>
</body>
</html>